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(5 BYA) Solar System
Our solar syatem was swirling mass of gas and dust -
(4.6 BYA) Earth Formed
The Earth began to form and grow by colliding with space debris. -
(4 BYA) Radiometric Dating
Methods of establishing the age of materials. -
(4 BYA) Atmosphere
Volcanoes emitted gas, forming an atmosphere. -
(1 BYA) Ozone
Ozone(o3) formed- protected organisms from harmful UV rays so they could exist on land. -
(3.5 BYA) Earth
It took one-half billion years for Earth to form from a swirling mass of gases. Sometime after Earth formed, living organisms began to affect the atmosphere. -
(3 BYA) Life
So form of life started to photosynthesize. -
(2.2 BYA) Earth
Earth started to appear just as much as it does today. -
(2 BYA)o2
O2 levels reached todays levels. -
(1.5 BYA) Life
Lives varied from a fraction to a second. -
Thomas Chech(1947)
He found that a type RNA found in unicellular eukaryotes is able to act as a chemical catalyst. -
Urey and Miller (1893-1981)
Miler and Urey set up an experiment using Oparins hypothesis as a starting point. -
Fox (1912-1988)
Fox has done extensive research on the ohysical structures that may have given rise to the first cells. -
Radiometeric Dating
Methods of establishing the age of materials include the techniques known as Radiometric Dating. -
Lynn Margulis(1938)
She proposed that early prokaryotic cells may have developed a mutually beneficial relationship. -
First Microscopes (1626-1697)
revealed that the world wasteeming with tiny creatures -
Redi's experiment (1626-1697)
noticed and described the different development forms of flies -
Spallanzani's experiment (1729-1799)
desighned an experiment to test the hypothesis of spontanius generations -
Pasteur's experiment (1822-1895)
pasteur set up a prize winning experiment to set up objections on to spollanzis experiment -
Oparin's hypothesis(1894-1980)
they thought that the atmosphere contained ammonia
